火药是由硫 、 碳和硝酸钾组成.Gunpowder is composed of sulfur, carbon, and potassium nitrate.氨对硝酸钾的选择分离结晶效果较好.And ammonia had effective selectivity for the separation of potassium nitrate.用氯化钾与硝酸铵为原料,采用复分解法生产农用硝酸钾与氯化铵.Agricultural pot...
Shares slid 11p to 293p after brokers downgraded their profit estimates.股票经纪人降低了他们的利润预期之后，股价下跌了11便士至293便士。Most of those shares were purchased from brokers.大部分的股份是从经纪人手中购得的。Brown-nosing the power brokers won't save y...
土壤这样贫瘠，植物能获得足够的养分吗？Can plants obtain adequate nourishment from such poor soil?植物从它们赖以生存的土壤中吸收养分.Plants get the nutrition from the soil in which they grow.植物从土壤中吸取养分.Plant sucks from the soil....